/* Chart Builder — Cambridge Lower Secondary Stage 7, Unit 7 (Organising and
   presenting data). Everything is scoped under .cb so it cannot touch the rest
   of the site. Dark theme follows the site's [data-theme="dark"]. */

/* Layout: workbench — data editor on the left, the drawn chart + working on the right; stacks on phones */.cb{
  --brand:#0b57d0; --brand-strong:#0740a8; --brand-soft:#dceeff; --brand-faint:#f0f7ff;
  --accent:#f5a524; --accent-soft:#fff2da;
  --bg:#f5f8fc; --panel:#ffffff; --fg:#0b1220; --fg2:#2b3a53; --muted:#5b6b85;
  --line:#dfe5ee; --line2:#eef2f7; --grid:#e6ecf4;
  --ok:#16a34a; --ok-soft:#e7f7ec; --bad:#dc2626; --bad-soft:#fdecec;
  --on-color:#ffffff;
  --c1:#0b57d0; --c2:#f5a524; --c3:#16a34a; --c4:#e5484d; --c5:#8e4ec6; --c6:#0e9fa5; --c7:#d6409f; --c8:#7c5c3b; --c9:#5b6b85; --c10:#84a700;
  --f-display:"Plus Jakarta Sans","Inter","Kantumruy Pro",system-ui,sans-serif;
  --f-body:"Inter","Kantumruy Pro","Noto Sans Khmer",system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
  --f-mono:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --r-sm:8px; --r-md:14px; --r-lg:20px;
}
[data-theme="dark"] .cb{
  --brand:#5ca8ff; --brand-strong:#8cc2ff; --brand-soft:#16315a; --brand-faint:#0f1d33;
  --accent:#ffb84a; --accent-soft:#3a2a10;
  --bg:#0a111d; --panel:#111a2a; --fg:#e8eef8; --fg2:#c3cfe2; --muted:#8a9ab3;
  --line:#24324a; --line2:#1a2538; --grid:#1f2c42;
  --ok:#3ccf74; --ok-soft:#0f2c1b; --bad:#ff6b6b; --bad-soft:#341616;
  --c1:#4f9bff; --c2:#ffb84a; --c3:#3ccf74; --c4:#ff6b6b; --c5:#b083f0; --c6:#2cc7cc; --c7:#f06cbd; --c8:#c09a6b; --c9:#8a9ab3; --c10:#b5d33a;
  color-scheme:dark}
.cb :focus-visible{outline:2px solid var(--brand);outline-offset:2px}


/* type picker */.cb .types{display:grid;grid-template-columns:repeat(auto-fill,minmax(118px,1fr));gap:8px;margin-bottom:18px}
.cb .type{display:flex;flex-direction:column;align-items:flex-start;gap:6px;padding:10px 11px;border:1px solid var(--line);border-radius:var(--r-md);background:var(--panel);cursor:pointer;text-align:left;transition:border-color .15s,background .15s}
.cb .type:hover{border-color:var(--brand)}
.cb .type[aria-pressed="true"]{border-color:var(--brand);background:var(--brand-faint);box-shadow:inset 0 0 0 1px var(--brand)}
.cb .type svg{width:34px;height:24px}
.cb .type span{font-size:13px;font-weight:600;line-height:1.2}
.cb .type small{font-size:11px;color:var(--muted);line-height:1.2}


/* main grid */.cb .main{display:grid;grid-template-columns:minmax(0,380px) minmax(0,1fr);gap:18px;align-items:start}
@media (max-width:960px){.cb .main{grid-template-columns:minmax(0,1fr)}
}
.cb .panel{background:var(--panel);border:1px solid var(--line);border-radius:var(--r-lg);padding:16px;min-width:0}
.cb .panel h2{font-size:16px;font-weight:700;margin-bottom:10px;display:flex;align-items:center;gap:8px}
.cb .stack{display:flex;flex-direction:column;gap:16px;min-width:0}
.cb-field{display:flex;flex-direction:column;gap:4px}
.cb-field label,.cb .lab{font-size:12px;font-weight:600;color:var(--muted)}
.cb .row2{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.cb input[type=text],.cb input[type=number],.cb select,.cb textarea{width:100%;border:1px solid var(--line);background:var(--bg);border-radius:var(--r-sm);padding:7px 9px;min-width:0}
.cb input:focus,.cb select:focus,.cb textarea:focus{border-color:var(--brand);outline:none;box-shadow:0 0 0 3px var(--brand-soft)}
.cb textarea{resize:vertical;min-height:64px;font-family:var(--f-mono);font-size:13px}


/* data table editor */.cb .dt{width:100%;border-collapse:separate;border-spacing:0 6px}
.cb .dt th{font-size:12px;font-weight:600;color:var(--muted);text-align:left;padding:0 4px}
.cb .dt th input{font-weight:600;font-size:12px;padding:4px 7px}
.cb .dt td{padding:0 3px}
.cb .dt td.cb-n{width:26px;font-size:12px;color:var(--muted);text-align:center;font-variant-numeric:tabular-nums}
.cb .dt input{font-variant-numeric:tabular-nums}
.cb .dt td.x{width:30px}
.cb .icon-btn{width:28px;height:30px;border:1px solid transparent;background:transparent;border-radius:var(--r-sm);cursor:pointer;color:var(--muted);display:grid;place-items:center}
.cb .icon-btn:hover{border-color:var(--line);color:var(--bad)}
.cb-btn{display:inline-flex;align-items:center;gap:6px;border:1px solid var(--line);background:var(--panel);border-radius:999px;padding:7px 14px;font-weight:600;font-size:13px;cursor:pointer}
.cb-btn:hover{border-color:var(--brand);color:var(--brand)}
.cb-btn.cb-primary{background:var(--brand);border-color:var(--brand);color:var(--on-color)}
.cb-btn.cb-primary:hover{background:var(--brand-strong);color:var(--on-color)}
.cb .btns{display:flex;flex-wrap:wrap;gap:8px}
.cb details.raw{border-top:1px dashed var(--line);padding-top:12px}
.cb details.raw summary{cursor:pointer;font-weight:600;font-size:13px;color:var(--brand)}
.cb details.raw .
.cb-hint{font-size:12.5px;color:var(--muted);margin:0}
.cb .total-chip{font-family:var(--f-mono);font-size:12px;background:var(--brand-faint);color:var(--brand);border-radius:999px;padding:2px 9px;margin-left:auto;font-weight:500}


/* chart stage */.cb .stage-head{display:flex;flex-wrap:wrap;gap:10px;align-items:center;justify-content:space-between;margin-bottom:8px}
.cb .toggles{display:flex;flex-wrap:wrap;gap:6px}
.cb .tog{display:inline-flex;align-items:center;gap:6px;font-size:13px;font-weight:600;border:1px solid var(--line);border-radius:999px;padding:5px 12px;cursor:pointer;background:var(--panel)}
.cb .tog[aria-pressed="true"]{background:var(--fg);color:var(--panel);border-color:var(--fg)}
.cb .paper{background:var(--panel);border-radius:var(--r-md);overflow-x:auto;min-height:280px}
.cb .paper svg{display:block;width:100%;height:auto;max-width:760px;margin:0 auto}
.cb .paper .cb-t{fill:var(--fg);font-family:var(--f-body)}
.cb .paper .cb-tm{fill:var(--muted);font-family:var(--f-body)}
.cb .paper .cb-tt{fill:var(--fg);font-family:var(--f-display);font-weight:700}
.cb .paper .cb-ax{stroke:var(--fg);stroke-width:1.5}
.cb .paper .cb-gr{stroke:var(--grid);stroke-width:1}
.cb .paper .cb-on{fill:var(--on-color);font-family:var(--f-body);font-weight:600}
.cb .hidden-chart{display:grid;place-items:center;min-height:300px;text-align:center;padding:24px;border:2px dashed var(--line);border-radius:var(--r-md);color:var(--muted)}
.cb .hidden-chart b{display:block;color:var(--fg);font-family:var(--f-display);font-size:18px;margin-bottom:4px}


/* tables inside chart / working */.cb .tbl-wrap{overflow-x:auto}
.cb table.cb-k{border-collapse:collapse;width:100%;font-variant-numeric:tabular-nums;font-size:14px}
.cb table.cb-k th,.cb table.cb-k td{border:1px solid var(--line);padding:7px 10px;text-align:center}
.cb table.cb-k th{background:var(--brand-faint);font-weight:600;color:var(--fg)}
.cb table.cb-k td.l,.cb table.cb-k th.l{text-align:left}
.cb table.cb-k tr.tot td{font-weight:700;background:var(--line2)}
.cb table.cb-k .calc{font-family:var(--f-mono);font-size:12.5px;color:var(--fg2)}
.cb .tally svg{height:26px;width:auto;vertical-align:middle;max-width:none;margin:0}
.cb .chart-title{font-family:var(--f-display);font-weight:700;text-align:center;font-size:17px;margin:14px 0 10px}


/* carroll */.cb table.carroll td{vertical-align:top;height:90px;width:40%}
.cb table.carroll td span{display:inline-block;margin:2px 4px;font-family:var(--f-mono);font-size:13px}


/* working / practice */.cb .work{border-top:1px solid var(--line);margin-top:14px;padding-top:14px;display:flex;flex-direction:column;gap:10px}
.cb .work h3{font-size:14px;font-weight:700}
.cb-step{display:flex;gap:10px;align-items:flex-start;font-size:14px}
.cb-step .no{flex:none;width:22px;height:22px;border-radius:50%;background:var(--accent-soft);color:var(--fg);font-size:12px;font-weight:700;display:grid;place-items:center;margin-top:1px}
.cb .formula{font-family:var(--f-mono);font-size:13px;background:var(--line2);padding:1px 6px;border-radius:5px}
.cb .q{display:grid;grid-template-columns:minmax(0,1fr) 120px 28px;gap:8px;align-items:center;padding:6px 0;border-bottom:1px solid var(--line2);font-size:14px}
.cb .q .mark{font-weight:700;text-align:center}
.cb .q.ok input,.cb .q.ok select{border-color:var(--ok);background:var(--ok-soft)}
.cb .q.bad input,.cb .q.bad select{border-color:var(--bad);background:var(--bad-soft)}
.cb .q .mark.ok{color:var(--ok)}
.cb .q .mark.bad{color:var(--bad)}
.cb .score{font-weight:700}


/* side info */.cb .tips{margin:0;padding-left:18px;list-style:disc;display:flex;flex-direction:column;gap:4px;font-size:14px;color:var(--fg2)}
.cb .use{font-size:14px;background:var(--accent-soft);border-radius:var(--r-sm);padding:8px 11px;margin:0 0 10px}
.cb .chooser .row2{margin-bottom:8px}
.cb .rec{display:flex;flex-wrap:wrap;gap:6px;align-items:center;font-size:14px}
.cb .rec button{border:1px solid var(--brand);color:var(--brand);background:var(--brand-faint);border-radius:999px;padding:4px 11px;font-weight:600;cursor:pointer;font-size:13px}
.cb .legend-note{font-size:12.5px;color:var(--muted);text-align:center;margin:6px 0 0}
.cb .sort-pills{display:flex;flex-wrap:wrap;gap:4px}
@media (prefers-reduced-motion:reduce){.cb *{transition:none!important}
}
@media (max-width:520px){.cb .q{grid-template-columns:minmax(0,1fr) 92px 22px}
.cb .row2{grid-template-columns:1fr}
}


.cb{color:var(--fg);font-family:var(--f-body);font-size:15px;line-height:1.5}
.cb *,.cb *::before,.cb *::after{box-sizing:border-box}
.cb h2,.cb h3{font-family:var(--f-display);text-wrap:balance;margin:0;letter-spacing:-.01em;color:var(--fg)}
.cb button,.cb input,.cb select,.cb textarea{font:inherit;color:inherit;margin:0}
.cb label{margin:0}
.cb table{margin:0}
.cb ul{margin:0}